Average Costs:

• Per Square Foot:
• $0.50–$2.30 for materials.

• $3–$7.50 with installation for attics.

• By Area:

• Existing Walls: $1.75–$3.50 per sq. ft.
• New Homes (attics): $2–$4 per sq. ft.
• Attic Insulation (1,000 sq. ft.): $600–$1,200 (materials) or $3,000–$7,500 (installed).

Material Types & Costs:

• Fiberglass:
• $0.50–$1.10 per sq. ft.

• Affordable, moisture-resistant, and fire-resistant. R-value: 2.5–3.5 per inch.

• Cellulose:

• $0.60–$2.30 per sq. ft.

• Eco-friendly, but emits VOCs. R-value: 3.2–3.7 per inch.

• Rockwool (Mineral Wool):

• $1.40–$2.10 per sq. ft.

• Naturally flame and insect-resistant. R-value: 3.0–3.7 per inch.

• Natural Wool (Sheep’s Wool):

• $1.50–$3.10 per sq. ft.
• Ideal for cold climates, mold-resistant, and durable. R-value: 3.5–3.8 per inch.

Cost Factors:

• Size of the Area:

• Insulating a 1,000 sq. ft. attic costs $600–$1,200 (materials only).

• Labor:

• $40–$70 per hour. Labor makes up 30–60% of the total cost.

• R-Value:

• Higher R-values (insulation efficiency) cost more.

• Home Location:

• Costs vary by climate; colder regions require higher R-values and thicker insulation.

Additional Costs:

• Air Sealing: $300–$1,500 to seal gaps before insulation.
• Mold Remediation: $1,125–$3,345 to remove mold before installation.
• Asbestos Removal: $1,120–$2,910 if insulation contains asbestos.

DIY vs. Hiring a Pro:

• DIY Costs:
• Insulation bags: $30–$70 each (covers ~100 sq. ft.).

• Blowing machine rental: $100–$200 per day.

• Hiring a Pro:

• Saves time and ensures proper installation.
• Spot hazards like mold or asbestos.

Benefits of Blown-In Insulation:

• Easy and quick to install.
• Efficient for thermal regulation.
• Fire-resistant and insect-repellent.
• Reduces energy consumption and bills.

When to Replace or Add Insulation:

• Rising energy bills.
• Drafty rooms or uneven temperatures.
• Cold floors or frozen pipes.
• Insufficient soundproofing.

Blown-in insulation is a cost-effective and efficient way to keep your home cozy and energy-efficient!

FAQs About Blown-In Insulation

• Is blown-in insulation worth it?

• Answer: Yes, for many homeowners! Blown-in insulation is efficient, easy to install, and provides excellent thermal regulation. Most types are mold-resistant, flame-resistant, and insect-resistant, making them safe and durable.

• How long does blown-in insulation last?

• Answer: Typically 20 to 30 years, depending on the material.

  • Cellulose & Sheep’s Wool: Up to 30 years.
  • Fiberglass & Rockwool: Up to 50+ years, as long as no significant issues like flooding or mold occur.

• Should I remove old insulation before adding blown-in insulation

• Answer: It depends:

  • If the old insulation is decades old or harbors mold, insects, or mildew, it’s best to remove it.
  • Otherwise, you can usually add blown-in insulation on top of pre-existing materials after ensuring the space is clean and safe.

• Is blown-in insulation cheaper than spray foam?

• Answer:
  • Blown-in insulation: Costs $0.50–$2.30 per square foot on average.
  • Spray foam: Costs $1–$2 per square foot but typically requires professional installation.
• Verdict: Blown-in insulation has a lower starting cost, but spray foam may offer better long-term performance for specific applications.

For further details on materials, costs, and tips, feel free to ask!

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